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[SCSI] aic79xx: Remove busyq

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From: Jeff Garzik <jgarzik@pobox.com>

This patch removes the busyq in aic79xx and uses the command-queue from 
the midlayer instead. Additionally some dead code is removed.

Signed-off-by: Hannes Reinecke <hare@suse.de>

Fixed rejections

Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
Hannes Reinecke 2005-07-22 16:42:28 +02:00 committed by James Bottomley
parent 8d6810d33e
commit 60a1321384
4 changed files with 154 additions and 739 deletions
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1
drivers/scsi/aic7xxx/aic79xx_core.c
View File

@ -9039,7 +9039,6 @@ ahd_dump_card_state(struct ahd_softc *ahd)
ahd_outb(ahd, STACK, (ahd->saved_stack[i] >> 8) & 0xFF);
}
printf("\n<<<<<<<<<<<<<<<<< Dump Card State Ends >>>>>>>>>>>>>>>>>>\n");
ahd_platform_dump_card_state(ahd);
ahd_restore_modes(ahd, saved_modes);
if (paused == 0)
ahd_unpause(ahd);

604
drivers/scsi/aic7xxx/aic79xx_osm.c
View File

@ -53,11 +53,6 @@
#include "aiclib.c"
#include <linux/init.h> /* __setup */
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
#include "sd.h" /* For geometry detection */
#endif
#include <linux/mm.h> /* For fetching system memory size */
#include <linux/delay.h> /* For ssleep/msleep */
@ -66,11 +61,6 @@
*/
spinlock_t ahd_list_spinlock;
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
/* For dynamic sglist size calculation. */
u_int ahd_linux_nseg;
#endif
/*
* Bucket size for counting good commands in between bad ones.
*/
@ -457,7 +447,6 @@ static void ahd_linux_filter_inquiry(struct ahd_softc *ahd,
static void ahd_linux_dev_timed_unfreeze(u_long arg);
static void ahd_linux_sem_timeout(u_long arg);
static void ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd);
static void ahd_linux_size_nseg(void);
static void ahd_linux_thread_run_complete_queue(struct ahd_softc *ahd);
static void ahd_linux_start_dv(struct ahd_softc *ahd);
static void ahd_linux_dv_timeout(struct scsi_cmnd *cmd);
@ -516,31 +505,23 @@ static struct ahd_linux_device* ahd_linux_alloc_device(struct ahd_softc*,
u_int);
static void ahd_linux_free_device(struct ahd_softc*,
struct ahd_linux_device*);
static void ahd_linux_run_device_queue(struct ahd_softc*,
struct ahd_linux_device*);
static int ahd_linux_run_command(struct ahd_softc*,
struct ahd_linux_device*,
struct scsi_cmnd *);
static void ahd_linux_setup_tag_info_global(char *p);
static aic_option_callback_t ahd_linux_setup_tag_info;
static aic_option_callback_t ahd_linux_setup_rd_strm_info;
static aic_option_callback_t ahd_linux_setup_dv;
static aic_option_callback_t ahd_linux_setup_iocell_info;
static int ahd_linux_next_unit(void);
static void ahd_runq_tasklet(unsigned long data);
static int aic79xx_setup(char *c);
/****************************** Inlines ***************************************/
static __inline void ahd_schedule_completeq(struct ahd_softc *ahd);
static __inline void ahd_schedule_runq(struct ahd_softc *ahd);
static __inline void ahd_setup_runq_tasklet(struct ahd_softc *ahd);
static __inline void ahd_teardown_runq_tasklet(struct ahd_softc *ahd);
static __inline struct ahd_linux_device*
ahd_linux_get_device(struct ahd_softc *ahd, u_int channel,
u_int target, u_int lun, int alloc);
static struct ahd_cmd *ahd_linux_run_complete_queue(struct ahd_softc *ahd);
static __inline void ahd_linux_check_device_queue(struct ahd_softc *ahd,
struct ahd_linux_device *dev);
static __inline struct ahd_linux_device *
ahd_linux_next_device_to_run(struct ahd_softc *ahd);
static __inline void ahd_linux_run_device_queues(struct ahd_softc *ahd);
static __inline void ahd_linux_unmap_scb(struct ahd_softc*, struct scb*);
static __inline void
@ -553,28 +534,6 @@ ahd_schedule_completeq(struct ahd_softc *ahd)
}
}
/*
* Must be called with our lock held.
*/
static __inline void
ahd_schedule_runq(struct ahd_softc *ahd)
{
tasklet_schedule(&ahd->platform_data->runq_tasklet);
}
static __inline
void ahd_setup_runq_tasklet(struct ahd_softc *ahd)
{
tasklet_init(&ahd->platform_data->runq_tasklet, ahd_runq_tasklet,
(unsigned long)ahd);
}
static __inline void
ahd_teardown_runq_tasklet(struct ahd_softc *ahd)
{
tasklet_kill(&ahd->platform_data->runq_tasklet);
}
static __inline struct ahd_linux_device*
ahd_linux_get_device(struct ahd_softc *ahd, u_int channel, u_int target,
u_int lun, int alloc)
@ -640,46 +599,6 @@ ahd_linux_run_complete_queue(struct ahd_softc *ahd)
return (acmd);
}
static __inline void
ahd_linux_check_device_queue(struct ahd_softc *ahd,
struct ahd_linux_device *dev)
{
if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) != 0
&& dev->active == 0) {
dev->flags &= ~AHD_DEV_FREEZE_TIL_EMPTY;
dev->qfrozen--;
}
if (TAILQ_FIRST(&dev->busyq) == NULL
|| dev->openings == 0 || dev->qfrozen != 0)
return;
ahd_linux_run_device_queue(ahd, dev);
}
static __inline struct ahd_linux_device *
ahd_linux_next_device_to_run(struct ahd_softc *ahd)
{
if ((ahd->flags & AHD_RESOURCE_SHORTAGE) != 0
|| (ahd->platform_data->qfrozen != 0
&& AHD_DV_SIMQ_FROZEN(ahd) == 0))
return (NULL);
return (TAILQ_FIRST(&ahd->platform_data->device_runq));
}
static __inline void
ahd_linux_run_device_queues(struct ahd_softc *ahd)
{
struct ahd_linux_device *dev;
while ((dev = ahd_linux_next_device_to_run(ahd)) != NULL) {
TAILQ_REMOVE(&ahd->platform_data->device_runq, dev, links);
dev->flags &= ~AHD_DEV_ON_RUN_LIST;
ahd_linux_check_device_queue(ahd, dev);
}
}
static __inline void
ahd_linux_unmap_scb(struct ahd_softc *ahd, struct scb *scb)
{
@ -709,7 +628,6 @@ ahd_linux_unmap_scb(struct ahd_softc *ahd, struct scb *scb)
static int ahd_linux_detect(Scsi_Host_Template *);
static const char *ahd_linux_info(struct Scsi_Host *);
static int ahd_linux_queue(Scsi_Cmnd *, void (*)(Scsi_Cmnd *));
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
static int ahd_linux_slave_alloc(Scsi_Device *);
static int ahd_linux_slave_configure(Scsi_Device *);
static void ahd_linux_slave_destroy(Scsi_Device *);
@ -717,78 +635,10 @@ static void ahd_linux_slave_destroy(Scsi_Device *);
static int ahd_linux_biosparam(struct scsi_device*,
struct block_device*, sector_t, int[]);
#endif
#else
static int ahd_linux_release(struct Scsi_Host *);
static void ahd_linux_select_queue_depth(struct Scsi_Host *host,
Scsi_Device *scsi_devs);
#if defined(__i386__)
static int ahd_linux_biosparam(Disk *, kdev_t, int[]);
#endif
#endif
static int ahd_linux_bus_reset(Scsi_Cmnd *);
static int ahd_linux_dev_reset(Scsi_Cmnd *);
static int ahd_linux_abort(Scsi_Cmnd *);
/*
* Calculate a safe value for AHD_NSEG (as expressed through ahd_linux_nseg).
*
* In pre-2.5.X...
* The midlayer allocates an S/G array dynamically when a command is issued
* using SCSI malloc. This array, which is in an OS dependent format that
* must later be copied to our private S/G list, is sized to house just the
* number of segments needed for the current transfer. Since the code that
* sizes the SCSI malloc pool does not take into consideration fragmentation
* of the pool, executing transactions numbering just a fraction of our
* concurrent transaction limit with SG list lengths aproaching AHC_NSEG will
* quickly depleat the SCSI malloc pool of usable space. Unfortunately, the
* mid-layer does not properly handle this scsi malloc failures for the S/G
* array and the result can be a lockup of the I/O subsystem. We try to size
* our S/G list so that it satisfies our drivers allocation requirements in
* addition to avoiding fragmentation of the SCSI malloc pool.
*/
static void
ahd_linux_size_nseg(void)
{
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
u_int cur_size;
u_int best_size;
/*
* The SCSI allocator rounds to the nearest 512 bytes
* an cannot allocate across a page boundary. Our algorithm
* is to start at 1K of scsi malloc space per-command and
* loop through all factors of the PAGE_SIZE and pick the best.
*/
best_size = 0;
for (cur_size = 1024; cur_size <= PAGE_SIZE; cur_size *= 2) {
u_int nseg;
nseg = cur_size / sizeof(struct scatterlist);
if (nseg < AHD_LINUX_MIN_NSEG)
continue;
if (best_size == 0) {
best_size = cur_size;
ahd_linux_nseg = nseg;
} else {
u_int best_rem;
u_int cur_rem;
/*
* Compare the traits of the current "best_size"
* with the current size to determine if the
* current size is a better size.
*/
best_rem = best_size % sizeof(struct scatterlist);
cur_rem = cur_size % sizeof(struct scatterlist);
if (cur_rem < best_rem) {
best_size = cur_size;
ahd_linux_nseg = nseg;
}
}
}
#endif
}
/*
* Try to detect an Adaptec 79XX controller.
@ -800,14 +650,6 @@ ahd_linux_detect(Scsi_Host_Template *template)
int found;
int error = 0;
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
/*
* It is a bug that the upper layer takes
* this lock just prior to calling us.
*/
spin_unlock_irq(&io_request_lock);
#endif
/*
* Sanity checking of Linux SCSI data structures so
* that some of our hacks^H^H^H^H^Hassumptions aren't
@ -819,10 +661,7 @@ ahd_linux_detect(Scsi_Host_Template *template)
printf("ahd_linux_detect: Unable to attach\n");
return (0);
}
/*
* Determine an appropriate size for our Scatter Gatther lists.
*/
ahd_linux_size_nseg();
#ifdef MODULE
/*
* If we've been passed any parameters, process them now.
@ -855,47 +694,10 @@ ahd_linux_detect(Scsi_Host_Template *template)
if (ahd_linux_register_host(ahd, template) == 0)
found++;
}
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
spin_lock_irq(&io_request_lock);
#endif
aic79xx_detect_complete++;
return 0;
}
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
/*
* Free the passed in Scsi_Host memory structures prior to unloading the
* module.
*/
static int
ahd_linux_release(struct Scsi_Host * host)
{
struct ahd_softc *ahd;
u_long l;
ahd_list_lock(&l);
if (host != NULL) {
/*
* We should be able to just perform
* the free directly, but check our
* list for extra sanity.
*/
ahd = ahd_find_softc(*(struct ahd_softc **)host->hostdata);
if (ahd != NULL) {
u_long s;
ahd_lock(ahd, &s);
ahd_intr_enable(ahd, FALSE);
ahd_unlock(ahd, &s);
ahd_free(ahd);
}
}
ahd_list_unlock(&l);
return (0);
}
#endif
/*
* Return a string describing the driver.
*/
@ -932,17 +734,9 @@ ahd_linux_queue(Scsi_Cmnd * cmd, void (*scsi_done) (Scsi_Cmnd *))
{
struct ahd_softc *ahd;
struct ahd_linux_device *dev;
u_long flags;
ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
/*
* Save the callback on completion function.
*/
cmd->scsi_done = scsi_done;
ahd_midlayer_entrypoint_lock(ahd, &flags);
/*
* Close the race of a command that was in the process of
* being queued to us just as our simq was frozen. Let
@ -951,39 +745,26 @@ ahd_linux_queue(Scsi_Cmnd * cmd, void (*scsi_done) (Scsi_Cmnd *))
*/
if (ahd->platform_data->qfrozen != 0
&& AHD_DV_CMD(cmd) == 0) {
printf("%s: queue frozen\n", ahd_name(ahd));
ahd_cmd_set_transaction_status(cmd, CAM_REQUEUE_REQ);
ahd_linux_queue_cmd_complete(ahd, cmd);
ahd_schedule_completeq(ahd);
ahd_midlayer_entrypoint_unlock(ahd, &flags);
return (0);
return SCSI_MLQUEUE_HOST_BUSY;
}
/*
* Save the callback on completion function.
*/
cmd->scsi_done = scsi_done;
dev = ahd_linux_get_device(ahd, cmd->device->channel,
cmd->device->id, cmd->device->lun,
/*alloc*/TRUE);
if (dev == NULL) {
ahd_cmd_set_transaction_status(cmd, CAM_RESRC_UNAVAIL);
ahd_linux_queue_cmd_complete(ahd, cmd);
ahd_schedule_completeq(ahd);
ahd_midlayer_entrypoint_unlock(ahd, &flags);
printf("%s: aic79xx_linux_queue - Unable to allocate device!\n",
ahd_name(ahd));
return (0);
}
if (cmd->cmd_len > MAX_CDB_LEN)
return (-EINVAL);
BUG_ON(dev == NULL);
cmd->result = CAM_REQ_INPROG << 16;
TAILQ_INSERT_TAIL(&dev->busyq, (struct ahd_cmd *)cmd, acmd_links.tqe);
if ((dev->flags & AHD_DEV_ON_RUN_LIST) == 0) {
TAILQ_INSERT_TAIL(&ahd->platform_data->device_runq, dev, links);
dev->flags |= AHD_DEV_ON_RUN_LIST;
ahd_linux_run_device_queues(ahd);
}
ahd_midlayer_entrypoint_unlock(ahd, &flags);
return (0);
return ahd_linux_run_command(ahd, dev, cmd);
}
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
static int
ahd_linux_slave_alloc(Scsi_Device *device)
{
@ -1049,99 +830,22 @@ ahd_linux_slave_destroy(Scsi_Device *device)
if (dev != NULL
&& (dev->flags & AHD_DEV_SLAVE_CONFIGURED) != 0) {
dev->flags |= AHD_DEV_UNCONFIGURED;
if (TAILQ_EMPTY(&dev->busyq)
&& dev->active == 0
if (dev->active == 0
&& (dev->flags & AHD_DEV_TIMER_ACTIVE) == 0)
ahd_linux_free_device(ahd, dev);
}
ahd_midlayer_entrypoint_unlock(ahd, &flags);
}
#else
/*
* Sets the queue depth for each SCSI device hanging
* off the input host adapter.
*/
static void
ahd_linux_select_queue_depth(struct Scsi_Host * host,
Scsi_Device * scsi_devs)
{
Scsi_Device *device;
Scsi_Device *ldev;
struct ahd_softc *ahd;
u_long flags;
ahd = *((struct ahd_softc **)host->hostdata);
ahd_lock(ahd, &flags);
for (device = scsi_devs; device != NULL; device = device->next) {
/*
* Watch out for duplicate devices. This works around
* some quirks in how the SCSI scanning code does its
* device management.
*/
for (ldev = scsi_devs; ldev != device; ldev = ldev->next) {
if (ldev->host == device->host
&& ldev->channel == device->channel
&& ldev->id == device->id
&& ldev->lun == device->lun)
break;
}
/* Skip duplicate. */
if (ldev != device)
continue;
if (device->host == host) {
struct ahd_linux_device *dev;
/*
* Since Linux has attached to the device, configure
* it so we don't free and allocate the device
* structure on every command.
*/
dev = ahd_linux_get_device(ahd, device->channel,
device->id, device->lun,
/*alloc*/TRUE);
if (dev != NULL) {
dev->flags &= ~AHD_DEV_UNCONFIGURED;
dev->scsi_device = device;
ahd_linux_device_queue_depth(ahd, dev);
device->queue_depth = dev->openings
+ dev->active;
if ((dev->flags & (AHD_DEV_Q_BASIC
| AHD_DEV_Q_TAGGED)) == 0) {
/*
* We allow the OS to queue 2 untagged
* transactions to us at any time even
* though we can only execute them
* serially on the controller/device.
* This should remove some latency.
*/
device->queue_depth = 2;
}
}
}
}
ahd_unlock(ahd, &flags);
}
#endif
#if defined(__i386__)
/*
* Return the disk geometry for the given SCSI device.
*/
static int
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
sector_t capacity, int geom[])
{
uint8_t *bh;
#else
ahd_linux_biosparam(Disk *disk, kdev_t dev, int geom[])
{
struct scsi_device *sdev = disk->device;
u_long capacity = disk->capacity;
struct buffer_head *bh;
#endif
int heads;
int sectors;
int cylinders;
@ -1151,22 +855,11 @@ ahd_linux_biosparam(Disk *disk, kdev_t dev, int geom[])
ahd = *((struct ahd_softc **)sdev->host->hostdata);
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
bh = scsi_bios_ptable(bdev);
#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,17)
bh = bread(MKDEV(MAJOR(dev), MINOR(dev) & ~0xf), 0, block_size(dev));
#else
bh = bread(MKDEV(MAJOR(dev), MINOR(dev) & ~0xf), 0, 1024);
#endif
if (bh) {
ret = scsi_partsize(bh, capacity,
&geom[2], &geom[0], &geom[1]);
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
kfree(bh);
#else
brelse(bh);
#endif
if (ret != -1)
return (ret);
}
@ -1198,7 +891,6 @@ ahd_linux_abort(Scsi_Cmnd *cmd)
{
struct ahd_softc *ahd;
struct ahd_cmd *acmd;
struct ahd_cmd *list_acmd;
struct ahd_linux_device *dev;
struct scb *pending_scb;
u_long s;
@ -1265,22 +957,6 @@ ahd_linux_abort(Scsi_Cmnd *cmd)
goto no_cmd;
}
TAILQ_FOREACH(list_acmd, &dev->busyq, acmd_links.tqe) {
if (list_acmd == acmd)
break;
}
if (list_acmd != NULL) {
printf("%s:%d:%d:%d: Command found on device queue\n",
ahd_name(ahd), cmd->device->channel, cmd->device->id,
cmd->device->lun);
TAILQ_REMOVE(&dev->busyq, list_acmd, acmd_links.tqe);
cmd->result = DID_ABORT << 16;
ahd_linux_queue_cmd_complete(ahd, cmd);
retval = SUCCESS;
goto done;
}
/*
* See if we can find a matching cmd in the pending list.
*/
@ -1468,7 +1144,6 @@ done:
}
spin_lock_irq(&ahd->platform_data->spin_lock);
}
ahd_schedule_runq(ahd);
ahd_linux_run_complete_queue(ahd);
ahd_midlayer_entrypoint_unlock(ahd, &s);
return (retval);
@ -1568,7 +1243,6 @@ ahd_linux_dev_reset(Scsi_Cmnd *cmd)
retval = FAILED;
}
ahd_lock(ahd, &s);
ahd_schedule_runq(ahd);
ahd_linux_run_complete_queue(ahd);
ahd_unlock(ahd, &s);
printf("%s: Device reset returning 0x%x\n", ahd_name(ahd), retval);
@ -1625,35 +1299,6 @@ Scsi_Host_Template aic79xx_driver_template = {
.slave_destroy = ahd_linux_slave_destroy,
};
/**************************** Tasklet Handler *********************************/
/*
* In 2.4.X and above, this routine is called from a tasklet,
* so we must re-acquire our lock prior to executing this code.
* In all prior kernels, ahd_schedule_runq() calls this routine
* directly and ahd_schedule_runq() is called with our lock held.
*/
static void
ahd_runq_tasklet(unsigned long data)
{
struct ahd_softc* ahd;
struct ahd_linux_device *dev;
u_long flags;
ahd = (struct ahd_softc *)data;
ahd_lock(ahd, &flags);
while ((dev = ahd_linux_next_device_to_run(ahd)) != NULL) {
TAILQ_REMOVE(&ahd->platform_data->device_runq, dev, links);
dev->flags &= ~AHD_DEV_ON_RUN_LIST;
ahd_linux_check_device_queue(ahd, dev);
/* Yeild to our interrupt handler */
ahd_unlock(ahd, &flags);
ahd_lock(ahd, &flags);
}
ahd_unlock(ahd, &flags);
}
/******************************** Bus DMA *************************************/
int
ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent,
@ -1997,11 +1642,7 @@ ahd_linux_register_host(struct ahd_softc *ahd, Scsi_Host_Template *template)
*((struct ahd_softc **)host->hostdata) = ahd;
ahd_lock(ahd, &s);
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
scsi_assign_lock(host, &ahd->platform_data->spin_lock);
#elif AHD_SCSI_HAS_HOST_LOCK != 0
host->lock = &ahd->platform_data->spin_lock;
#endif
ahd->platform_data->host = host;
host->can_queue = AHD_MAX_QUEUE;
host->cmd_per_lun = 2;
@ -2020,9 +1661,6 @@ ahd_linux_register_host(struct ahd_softc *ahd, Scsi_Host_Template *template)
ahd_set_name(ahd, new_name);
}
host->unique_id = ahd->unit;
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
scsi_set_pci_device(host, ahd->dev_softc);
#endif
ahd_linux_setup_user_rd_strm_settings(ahd);
ahd_linux_initialize_scsi_bus(ahd);
ahd_unlock(ahd, &s);
@ -2064,10 +1702,8 @@ ahd_linux_register_host(struct ahd_softc *ahd, Scsi_Host_Template *template)
ahd_linux_start_dv(ahd);
ahd_unlock(ahd, &s);
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
scsi_add_host(host, &ahd->dev_softc->dev); /* XXX handle failure */
scsi_scan_host(host);
#endif
return (0);
}
@ -2163,7 +1799,6 @@ ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg)
return (ENOMEM);
memset(ahd->platform_data, 0, sizeof(struct ahd_platform_data));
TAILQ_INIT(&ahd->platform_data->completeq);
TAILQ_INIT(&ahd->platform_data->device_runq);
ahd->platform_data->irq = AHD_LINUX_NOIRQ;
ahd->platform_data->hw_dma_mask = 0xFFFFFFFF;
ahd_lockinit(ahd);
@ -2175,7 +1810,6 @@ ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg)
init_MUTEX_LOCKED(&ahd->platform_data->eh_sem);
init_MUTEX_LOCKED(&ahd->platform_data->dv_sem);
init_MUTEX_LOCKED(&ahd->platform_data->dv_cmd_sem);
ahd_setup_runq_tasklet(ahd);
ahd->seltime = (aic79xx_seltime & 0x3) << 4;
return (0);
}
@ -2190,11 +1824,8 @@ ahd_platform_free(struct ahd_softc *ahd)
if (ahd->platform_data != NULL) {
del_timer_sync(&ahd->platform_data->completeq_timer);
ahd_linux_kill_dv_thread(ahd);
ahd_teardown_runq_tasklet(ahd);
if (ahd->platform_data->host != NULL) {
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
scsi_remove_host(ahd->platform_data->host);
#endif
scsi_host_put(ahd->platform_data->host);
}
@ -2233,16 +1864,6 @@ ahd_platform_free(struct ahd_softc *ahd)
release_mem_region(ahd->platform_data->mem_busaddr,
0x1000);
}
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
/*
* In 2.4 we detach from the scsi midlayer before the PCI
* layer invokes our remove callback. No per-instance
* detach is provided, so we must reach inside the PCI
* subsystem's internals and detach our driver manually.
*/
if (ahd->dev_softc != NULL)
ahd->dev_softc->driver = NULL;
#endif
free(ahd->platform_data, M_DEVBUF);
}
}
@ -2339,7 +1960,7 @@ ahd_platform_set_tags(struct ahd_softc *ahd, struct ahd_devinfo *devinfo,
dev->maxtags = 0;
dev->openings = 1 - dev->active;
}
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
if (dev->scsi_device != NULL) {
switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) {
case AHD_DEV_Q_BASIC:
@ -2365,65 +1986,13 @@ ahd_platform_set_tags(struct ahd_softc *ahd, struct ahd_devinfo *devinfo,
break;
}
}
#endif
}
int
ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel,
int lun, u_int tag, role_t role, uint32_t status)
{
int targ;
int maxtarg;
int maxlun;
int clun;
int count;
if (tag != SCB_LIST_NULL)
return (0);
targ = 0;
if (target != CAM_TARGET_WILDCARD) {
targ = target;
maxtarg = targ + 1;
} else {
maxtarg = (ahd->features & AHD_WIDE) ? 16 : 8;
}
clun = 0;
if (lun != CAM_LUN_WILDCARD) {
clun = lun;
maxlun = clun + 1;
} else {
maxlun = AHD_NUM_LUNS;
}
count = 0;
for (; targ < maxtarg; targ++) {
for (; clun < maxlun; clun++) {
struct ahd_linux_device *dev;
struct ahd_busyq *busyq;
struct ahd_cmd *acmd;
dev = ahd_linux_get_device(ahd, /*chan*/0, targ,
clun, /*alloc*/FALSE);
if (dev == NULL)
continue;
busyq = &dev->busyq;
while ((acmd = TAILQ_FIRST(busyq)) != NULL) {
Scsi_Cmnd *cmd;
cmd = &acmd_scsi_cmd(acmd);
TAILQ_REMOVE(busyq, acmd,
acmd_links.tqe);
count++;
cmd->result = status << 16;
ahd_linux_queue_cmd_complete(ahd, cmd);
}
}
}
return (count);
return 0;
}
static void
@ -2478,18 +2047,10 @@ ahd_linux_dv_thread(void *data)
* Complete thread creation.
*/
lock_kernel();
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,60)
/*
* Don't care about any signals.
*/
siginitsetinv(&current->blocked, 0);
daemonize();
sprintf(current->comm, "ahd_dv_%d", ahd->unit);
#else
daemonize("ahd_dv_%d", ahd->unit);
current->flags |= PF_NOFREEZE;
#endif
current->flags |= PF_FREEZE;
unlock_kernel();
while (1) {
@ -3685,8 +3246,6 @@ ahd_linux_dv_timeout(struct scsi_cmnd *cmd)
ahd->platform_data->reset_timer.function =
(ahd_linux_callback_t *)ahd_release_simq;
add_timer(&ahd->platform_data->reset_timer);
if (ahd_linux_next_device_to_run(ahd) != NULL)
ahd_schedule_runq(ahd);
ahd_linux_run_complete_queue(ahd);
ahd_unlock(ahd, &flags);
}
@ -3903,11 +3462,10 @@ ahd_linux_device_queue_depth(struct ahd_softc *ahd,
}
}
static void
ahd_linux_run_device_queue(struct ahd_softc *ahd, struct ahd_linux_device *dev)
static int
ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev,
struct scsi_cmnd *cmd)
{
struct ahd_cmd *acmd;
struct scsi_cmnd *cmd;
struct scb *scb;
struct hardware_scb *hscb;
struct ahd_initiator_tinfo *tinfo;
@ -3915,27 +3473,6 @@ ahd_linux_run_device_queue(struct ahd_softc *ahd, struct ahd_linux_device *dev)
u_int col_idx;
uint16_t mask;
if ((dev->flags & AHD_DEV_ON_RUN_LIST) != 0)
panic("running device on run list");
while ((acmd = TAILQ_FIRST(&dev->busyq)) != NULL
&& dev->openings > 0 && dev->qfrozen == 0) {
/*
* Schedule us to run later. The only reason we are not
* running is because the whole controller Q is frozen.
*/
if (ahd->platform_data->qfrozen != 0
&& AHD_DV_SIMQ_FROZEN(ahd) == 0) {
TAILQ_INSERT_TAIL(&ahd->platform_data->device_runq,
dev, links);
dev->flags |= AHD_DEV_ON_RUN_LIST;
return;
}
cmd = &acmd_scsi_cmd(acmd);
/*
* Get an scb to use.
*/
@ -3949,13 +3486,10 @@ ahd_linux_run_device_queue(struct ahd_softc *ahd, struct ahd_linux_device *dev)
cmd->device->lun);
}
if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) {
TAILQ_INSERT_TAIL(&ahd->platform_data->device_runq,
dev, links);
dev->flags |= AHD_DEV_ON_RUN_LIST;
ahd->flags |= AHD_RESOURCE_SHORTAGE;
return;
return SCSI_MLQUEUE_HOST_BUSY;
}
TAILQ_REMOVE(&dev->busyq, acmd, acmd_links.tqe);
scb->io_ctx = cmd;
scb->platform_data->dev = dev;
hscb = scb->hscb;
@ -3985,7 +3519,6 @@ ahd_linux_run_device_queue(struct ahd_softc *ahd, struct ahd_linux_device *dev)
}
if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) {
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
int msg_bytes;
uint8_t tag_msgs[2];
@ -3995,7 +3528,6 @@ ahd_linux_run_device_queue(struct ahd_softc *ahd, struct ahd_linux_device *dev)
if (tag_msgs[0] == MSG_ORDERED_TASK)
dev->commands_since_idle_or_otag = 0;
} else
#endif
if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH
&& (dev->flags & AHD_DEV_Q_TAGGED) != 0) {
hscb->control |= MSG_ORDERED_TASK;
@ -4065,7 +3597,8 @@ ahd_linux_run_device_queue(struct ahd_softc *ahd, struct ahd_linux_device *dev)
dev->commands_since_idle_or_otag++;
scb->flags |= SCB_ACTIVE;
ahd_queue_scb(ahd, scb);
}
return 0;
}
/*
@ -4081,8 +3614,6 @@ ahd_linux_isr(int irq, void *dev_id, struct pt_regs * regs)
ahd = (struct ahd_softc *) dev_id;
ahd_lock(ahd, &flags);
ours = ahd_intr(ahd);
if (ahd_linux_next_device_to_run(ahd) != NULL)
ahd_schedule_runq(ahd);
ahd_linux_run_complete_queue(ahd);
ahd_unlock(ahd, &flags);
return IRQ_RETVAL(ours);
@ -4161,7 +3692,6 @@ ahd_linux_alloc_device(struct ahd_softc *ahd,
return (NULL);
memset(dev, 0, sizeof(*dev));
init_timer(&dev->timer);
TAILQ_INIT(&dev->busyq);
dev->flags = AHD_DEV_UNCONFIGURED;
dev->lun = lun;
dev->target = targ;
@ -4264,28 +3794,9 @@ ahd_send_async(struct ahd_softc *ahd, char channel,
}
case AC_SENT_BDR:
{
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
WARN_ON(lun != CAM_LUN_WILDCARD);
scsi_report_device_reset(ahd->platform_data->host,
channel - 'A', target);
#else
Scsi_Device *scsi_dev;
/*
* Find the SCSI device associated with this
* request and indicate that a UA is expected.
*/
for (scsi_dev = ahd->platform_data->host->host_queue;
scsi_dev != NULL; scsi_dev = scsi_dev->next) {
if (channel - 'A' == scsi_dev->channel
&& target == scsi_dev->id
&& (lun == CAM_LUN_WILDCARD
|| lun == scsi_dev->lun)) {
scsi_dev->was_reset = 1;
scsi_dev->expecting_cc_ua = 1;
}
}
#endif
break;
}
case AC_BUS_RESET:
@ -4406,15 +3917,10 @@ ahd_done(struct ahd_softc *ahd, struct scb *scb)
if (dev->active == 0)
dev->commands_since_idle_or_otag = 0;
if (TAILQ_EMPTY(&dev->busyq)) {
if ((dev->flags & AHD_DEV_UNCONFIGURED) != 0
&& dev->active == 0
&& (dev->flags & AHD_DEV_TIMER_ACTIVE) == 0)
ahd_linux_free_device(ahd, dev);
} else if ((dev->flags & AHD_DEV_ON_RUN_LIST) == 0) {
TAILQ_INSERT_TAIL(&ahd->platform_data->device_runq, dev, links);
dev->flags |= AHD_DEV_ON_RUN_LIST;
}
if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
printf("Recovery SCB completes\n");
@ -4887,7 +4393,6 @@ ahd_release_simq(struct ahd_softc *ahd)
ahd->platform_data->flags &= ~AHD_DV_WAIT_SIMQ_RELEASE;
up(&ahd->platform_data->dv_sem);
}
ahd_schedule_runq(ahd);
ahd_unlock(ahd, &s);
/*
* There is still a race here. The mid-layer
@ -4929,61 +4434,16 @@ ahd_linux_dev_timed_unfreeze(u_long arg)
dev->flags &= ~AHD_DEV_TIMER_ACTIVE;
if (dev->qfrozen > 0)
dev->qfrozen--;
if (dev->qfrozen == 0
&& (dev->flags & AHD_DEV_ON_RUN_LIST) == 0)
ahd_linux_run_device_queue(ahd, dev);
if ((dev->flags & AHD_DEV_UNCONFIGURED) != 0
&& dev->active == 0)
ahd_linux_free_device(ahd, dev);
ahd_unlock(ahd, &s);
}
void
ahd_platform_dump_card_state(struct ahd_softc *ahd)
{
struct ahd_linux_device *dev;
int target;
int maxtarget;
int lun;
int i;
maxtarget = (ahd->features & AHD_WIDE) ? 15 : 7;
for (target = 0; target <=maxtarget; target++) {
for (lun = 0; lun < AHD_NUM_LUNS; lun++) {
struct ahd_cmd *acmd;
dev = ahd_linux_get_device(ahd, 0, target,
lun, /*alloc*/FALSE);
if (dev == NULL)
continue;
printf("DevQ(%d:%d:%d): ", 0, target, lun);
i = 0;
TAILQ_FOREACH(acmd, &dev->busyq, acmd_links.tqe) {
if (i++ > AHD_SCB_MAX)
break;
}
printf("%d waiting\n", i);
}
}
}
static int __init
ahd_linux_init(void)
{
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
return ahd_linux_detect(&aic79xx_driver_template);
#else
scsi_register_module(MODULE_SCSI_HA, &aic79xx_driver_template);
if (aic79xx_driver_template.present == 0) {
scsi_unregister_module(MODULE_SCSI_HA,
&aic79xx_driver_template);
return (-ENODEV);
}
return (0);
#endif
}
static void __exit
@ -5002,14 +4462,6 @@ ahd_linux_exit(void)
ahd_linux_kill_dv_thread(ahd);
}
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
/*
* In 2.4 we have to unregister from the PCI core _after_
* unregistering from the scsi midlayer to avoid dangling
* references.
*/
scsi_unregister_module(MODULE_SCSI_HA, &aic79xx_driver_template);
#endif
ahd_linux_pci_exit();
}

26
drivers/scsi/aic7xxx/aic79xx_osm.h
View File

@ -252,11 +252,7 @@ ahd_scb_timer_reset(struct scb *scb, u_int usec)
/***************************** SMP support ************************************/
#include <linux/spinlock.h>
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) || defined(SCSI_HAS_HOST_LOCK))
#define AHD_SCSI_HAS_HOST_LOCK 1
#else
#define AHD_SCSI_HAS_HOST_LOCK 0
#endif
#define AIC79XX_DRIVER_VERSION "1.3.11"
@ -297,12 +293,11 @@ struct ahd_cmd {
* after a successfully completed inquiry command to the target when
* that inquiry data indicates a lun is present.
*/
TAILQ_HEAD(ahd_busyq, ahd_cmd);
typedef enum {
AHD_DEV_UNCONFIGURED = 0x01,
AHD_DEV_FREEZE_TIL_EMPTY = 0x02, /* Freeze queue until active == 0 */
AHD_DEV_TIMER_ACTIVE = 0x04, /* Our timer is active */
AHD_DEV_ON_RUN_LIST = 0x08, /* Queued to be run later */
AHD_DEV_Q_BASIC = 0x10, /* Allow basic device queuing */
AHD_DEV_Q_TAGGED = 0x20, /* Allow full SCSI2 command queueing */
AHD_DEV_PERIODIC_OTAG = 0x40, /* Send OTAG to prevent starvation */
@ -312,7 +307,6 @@ typedef enum {
struct ahd_linux_target;
struct ahd_linux_device {
TAILQ_ENTRY(ahd_linux_device) links;
struct ahd_busyq busyq;
/*
* The number of transactions currently
@ -453,18 +447,7 @@ struct ahd_linux_target {
* manner and are allocated below 4GB, the number of S/G segments is
* unrestricted.
*/
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
/*
* We dynamically adjust the number of segments in pre-2.5 kernels to
* avoid fragmentation issues in the SCSI mid-layer's private memory
* allocator. See aic79xx_osm.c ahd_linux_size_nseg() for details.
*/
extern u_int ahd_linux_nseg;
#define AHD_NSEG ahd_linux_nseg
#define AHD_LINUX_MIN_NSEG 64
#else
#define AHD_NSEG 128
#endif
/*
* Per-SCB OSM storage.
@ -502,11 +485,9 @@ struct ahd_platform_data {
* Fields accessed from interrupt context.
*/
struct ahd_linux_target *targets[AHD_NUM_TARGETS];
TAILQ_HEAD(, ahd_linux_device) device_runq;
struct ahd_completeq completeq;
spinlock_t spin_lock;
struct tasklet_struct runq_tasklet;
u_int qfrozen;
pid_t dv_pid;
struct timer_list completeq_timer;
@ -925,12 +906,8 @@ ahd_flush_device_writes(struct ahd_softc *ahd)
}
/**************************** Proc FS Support *********************************/
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
int ahd_linux_proc_info(char *, char **, off_t, int, int, int);
#else
int ahd_linux_proc_info(struct Scsi_Host *, char *, char **,
off_t, int, int);
#endif
/*************************** Domain Validation ********************************/
#define AHD_DV_CMD(cmd) ((cmd)->scsi_done == ahd_linux_dv_complete)
@ -1117,7 +1094,6 @@ void ahd_done(struct ahd_softc*, struct scb*);
void ahd_send_async(struct ahd_softc *, char channel,
u_int target, u_int lun, ac_code, void *);
void ahd_print_path(struct ahd_softc *, struct scb *);
void ahd_platform_dump_card_state(struct ahd_softc *ahd);
#ifdef CONFIG_PCI
#define AHD_PCI_CONFIG 1

12
drivers/scsi/aic7xxx/aic79xx_proc.c
View File

@ -278,13 +278,8 @@ done:
* Return information to handle /proc support for the driver.
*/
int
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
ahd_linux_proc_info(char *buffer, char **start, off_t offset,
int length, int hostno, int inout)
#else
ahd_linux_proc_info(struct Scsi_Host *shost, char *buffer, char **start,
off_t offset, int length, int inout)
#endif
{
struct ahd_softc *ahd;
struct info_str info;
@ -296,14 +291,7 @@ ahd_linux_proc_info(struct Scsi_Host *shost, char *buffer, char **start,
retval = -EINVAL;
ahd_list_lock(&l);
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
TAILQ_FOREACH(ahd, &ahd_tailq, links) {
if (ahd->platform_data->host->host_no == hostno)
break;
}
#else
ahd = ahd_find_softc(*(struct ahd_softc **)shost->hostdata);
#endif
if (ahd == NULL)
goto done;